ChainThink report, October 27: According to Bloomberg, after a cyberattack on Japan's GMO Internet Group, hackers claimed to have publicly released customer data due to the failure to receive a $50 million ransom.

GMO has not confirmed whether the subsequent ransomware attack alleged by the hackers actually occurred. GMO's foreign exchange trading services have been suspended since October 21 and are no longer accepting new subscriptions;

All servers of its subsidiary domain and cloud service Onamae.com have been compromised, potentially affecting all users. Previously, some customers reported unauthorized transactions initiated without their consent.

Finance Minister Ayaka Kataoka stated that five foreign exchange trading firms have reported customer impact from the incident, with no new reports of unauthorized transactions received so far. GMO has requested government assistance to block the attack source;

Under concerns over the cyberattack, the company's stock posted its largest single-day drop since 2011 on Monday.